Random access in a mobile telecommunications system

Details Random access in a mobile telecommunications system Random access in a mobile telecommunications system

H - Electricity

04

W

H04W 74/08 (2009.01)

Patent

CA 2340695

A method is disclosed for processing mobile-originated random access requests (RA1, RA2, RA3) in a mobile telecommunications system (10) that randomly selects new signatures (102) for re-transmissions in the event that collisions have occurred. As such, the random access re-transmissions (RA1, RA2, RA3) are randomized over the signature domain instead of just over the time domain. Consequently, the disclosed invention significantly shortens random access delays caused by collisions or erroneous arrivals at base station receivers (14), and also significantly reduces the interval between random access re- transmissions (Td).

L'invention concerne un procédé pour le traitement de demandes d'accès aléatoire émanant d'un mobile (RA¿1?, RA¿2?, RA¿3?) dans un système de télécommunications mobile (10) sélectionnant de façon aléatoire de nouvelles identifications (102) pour des retransmissions au cas où des collisions se sont produites. Les retransmissions d'accès aléatoire (RA¿1?, RA¿2?, RA¿3?) sont ainsi mises sous forme aléatoire dans le domaine d'identification à la place d'un domaine juste supérieur au temps. En conséquence, l'invention réduit de façon significative les retards d'accès aléatoire provoqués par des collisions ou des arrivées erronées aux récepteurs de la station de base (14), ainsi que l'intervalle entre des retransmissions d'accès aléatoire (T¿d?).

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